A former Delaware optometrist will remain in custody pending a detention hearing on charges that he conspired with his family over several years to torment and stalk his ex-wife following a bitter divorce and custody battle that culminated in her death in a courthouse shooting.

The charges against David Matusiewicz are prosaic — suspected of being in Maryland when he said he was in New Jersey — but authorities are investigating his role in the murder of his ex-wife Christine Belford and her friend Laura Mulford, shot by his father Thomas Matusiewicz.

According to the Delaware State Police, three people were killed, including the suspected gunman, after a gunfight erupted inside the lobby of the New Castle County Courthouse Monday morning. Two Capitol police officers were wounded during the shootout.